β, regression coefficient; CI, confidence interval; RIN, RNA integrity number in the frontal cortex; tSTMN2 RNA, truncated STMN2 RNA concentration in the frontal cortex; pTDP-43 protein, phosphorylated TDP-43 protein concentration in the frontal cortex. β values, 95% CIs, and P values result from unadjusted linear regression models or linear regression models adjusted for the indicated variables. Twenty-nine–kilodalton TMEM106B abundance, pTDP-43 burden, and tSTMN2 RNA were considered on the base 10 logarithmic scale. β values are interpreted as the associations in 29-kDa TMEM106B abundance and the indicated variables. P < 0.025 was considered statistically significant after correcting for multiple testing.